Method for producing liquids, method for producing oily solid cosmetics, and precursor composition for producing oily solid cosmetics.

Abstract

This reduces the complexity of the manufacturing process for oil-based solid cosmetics. [Solution] A method for producing a fluid, comprising: a preparation step of preparing a first fluid containing a molten mixture of an oily component (A) having a melting point above 25°C and an oily component (B) having a lower melting point than the oily component (A); and a cooling step of cooling the first fluid while applying a shearing force to the first fluid to obtain a slurry-like second fluid containing particles of the oily component (A).

Description

Technical Field

[0001] The present disclosure relates to a method for producing a fluid substance, a method for producing an oil-based solid cosmetic, and a precursor composition for producing an oil-based solid cosmetic.

Background Art

[0002] Conventionally, oil-based solid cosmetics filled in containers such as lipsticks, lip creams, foundations, etc. are known. The basic manufacturing method of oil-based solid cosmetics is to melt and mix raw materials containing oil-based components, fill the obtained molten composition into a container for the final product, and cool and solidify it (for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the actual manufacturing process of oil-based solid cosmetics, it is known to perform inspections for quality control and the like before filling the composition into the container for the final product. In that case, while waiting for the inspection results, as shown in FIG. 1, the molten composition is housed in a larger temporary storage container Ct' and temporarily stored. During temporary storage, the composition becomes room temperature and solidifies into a solid Sd. Therefore, in order to fill it into the container Cp for the final product after the inspection, it is necessary to remelt the solidified composition. At that time, in order to shorten the melting time of the solid Sd, it is common to cut the solid Sd into pieces and heat-melt each solid piece Sdi. However, such a series of operations is complicated and time-consuming.

[0005] In view of the above points, one aspect of the present disclosure provides a technique capable of reducing the complexity of operations in the production of oil-based solid cosmetics. [Means for solving the problem]

[0006] One aspect of the present disclosure is a method for producing a fluid, comprising: a preparation step of preparing a first fluid containing a molten mixture of an oily component (A) having a melting point greater than 25°C and an oily component (B) having a lower melting point than the oily component (A); and a cooling step of cooling the first fluid while applying a shearing force to the first fluid to obtain a slurry-like second fluid containing particles of the oily component (A). [Effects of the Invention]

[0007] According to one aspect of this disclosure, the complexity of the work involved in the manufacture of oil-based solid cosmetics can be reduced. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing a manufacturing process using conventional technology. [Figure 2] This is a flowchart of a manufacturing method according to one embodiment of the present disclosure. [Figure 3] This is a schematic diagram showing a manufacturing process according to one embodiment of the present disclosure. [Modes for carrying out the invention]

[0009] The embodiments of this disclosure will be described in detail below, but the embodiments of this disclosure are not limited to the following description. The accompanying drawings will also be referenced in the description. In each drawing, unless otherwise specified, the same or corresponding components may be denoted by the same reference numerals and their descriptions may be omitted.

[0010] This disclosure relates to the manufacture of fluids containing oily components, particularly to the manufacture of fluids in the manufacture of oily solid cosmetics.

[0011] <Oil-based solid cosmetic> In this specification, "oil-based" cosmetics refer to cosmetics that primarily contain oil-based components. Here, "primarily containing" the target component means that the content of the target component is 50% by mass or more, preferably 75% by mass or more, and more preferably 90% by mass or more. Furthermore, "oil-based" cosmetics may preferably contain 30% by mass or less of aqueous components. Furthermore, "solid" refers to a form that does not flow by gravity at room temperature (25°C), for example, a solid product refers to a form that does not deform even when tilted. Furthermore, "solid" may preferably be in a solid state or a semi-solid state.

[0012] Oil-based solid cosmetics may include lip cosmetics such as lipstick, lip balm, and lip gloss; skin cosmetics such as foundation, concealer, eyeshadow, and blush; solid or balm-type antiperspirants; solid perfumes; and other solid or balm-type skin application agents. This disclosure is particularly suitable as a manufacturing technology for lipstick and antiperspirants among the above.

[0013] An oil-based solid cosmetic composition contains two or more oily components, preferably two or more oily components with different melting points. More specifically, an oil-based solid cosmetic composition may contain an oily component (A) with a melting point above 25°C and an oily component (B) with a lower melting point than oily component (A). In this specification, oily component (A) may be referred to as "high-melting-point oily component (A)" and oily component (B) may be referred to as "low-melting-point oily component (B)".

[0014] The melting point of the high-melting-point oily component (A) is not limited to any particular detail, as long as it is above 25°C. This can suppress the melting of the oily solid cosmetic composition at room temperature. The melting point of the high-melting-point oily component (A) may be 30°C or higher, 40°C or higher, 50°C or higher, 60°C or higher, 70°C or higher, 80°C or higher, or 90°C or higher. In particular, if the oily solid cosmetic composition contains a high-melting-point oily component (A) having a melting point of 80°C or higher (more preferably 90°C or higher), the melting of the oily solid cosmetic composition when exposed to temperatures higher than room temperature can be suppressed compared to the case where the oily solid cosmetic composition does not contain a high-melting-point oily component (A) having a melting point of 80°C or higher. The high-melting-point oily component (A) may be a single substance or a combination of two or more substances. When a combination of two or more substances is used as a high-melting-point oily component (A), a combination of two or more substances with different melting points may be used as the high-melting-point oily component (A).

[0015] The high-melting-point oily component (A) may be one or more of hydrocarbons, esters, higher alcohols, higher fatty acids, and silicones. Examples of esters include (i) carboxylic acid esters, thioesters, phosphate esters, sulfate esters, nitrate esters, carbonate esters, and their derivatives; (ii) esters of fatty acids and glycerin, and their derivatives (sometimes referred to as oils and fats); (iii) fatty acids and monohydric or dihydric aliphatic alcohols, and their derivatives (sometimes referred to as waxes, etc.); (iv) esters of fatty acids and sugars, and their derivatives (sometimes referred to as sugar fatty acid ester compounds). Examples of waxes include animal waxes, vegetable waxes, mineral waxes, silicone waxes, and synthetic waxes. Examples of sugar fatty acid ester compounds include sucrose fatty acid esters, dextrin fatty acid esters, inulin fatty acid esters, fructooligosaccharide fatty acid esters, and their derivatives. It is preferable that the high-melting-point oily component (A) contains waxes and / or sugar fatty acid ester compounds.

[0016] Specific examples of high-melting-point oily components (A) include beeswax, bleached beeswax, carnauba wax, candelilla wax, whale wax, montan wax, rice bran wax, lanolin, Japanese wax, hexyl laurate, reduced lanolin, hydrogenated jojoba oil, hard lanolin, shellac wax, microcrystalline wax, paraffin wax, polyethylene wax, Fischer-Tropsch wax, cetyl alcohol, stearyl alcohol, behenyl alcohol, hydrogenated oil, hydrogenated castor oil, petrolatum, alkyl silicone, jojoba esters, myristic acid, palmitic acid, lauric acid, stearic acid, dextrin palmitate, dextrin myristate, (palmitic acid / ethylhexanoic acid) dextrin, dextrin isostearate, fructooligosaccharide stearate, inulin stearate, etc.

[0017] The low-melting-point oily component (B) may be any oily component with a lower melting point than the high-melting-point oily component (A), and its details are not particularly limited. The low-melting-point oily component (B) may be selected according to the melting point of the high-melting-point oily component (A). The melting point of the low-melting-point oily component (B) may be 25°C or lower, less than 30°C, less than 40°C, less than 50°C, less than 60°C, less than 70°C, less than 80°C, or less than 90°C. Preferably, the melting point of the low-melting-point oily component (B) is 25°C or lower. Preferably, the low-melting-point oily component (B) is a compound that is liquid at room temperature (for example, 25°C). The low-melting-point oily component (B) may be a single substance or a combination of two or more substances. When a combination of two or more substances is used as the low-melting-point oily component (B), a combination of two or more substances with different melting points may be used as the low-melting-point oily component (B).

[0018] The low melting point oily component (B) may be one or more of hydrocarbons, esters, higher alcohols, fatty acids, and silicones. The low melting point oily component (B) may be one or more of hydrocarbon oils, ester oils, silicone oils, higher alcohol oils, fatty acids, and fats and oils. Specific examples of the low melting point oily component (B) include hydrocarbon oils such as liquid paraffin, squalane, polybutene, and heavy liquid isoparaffin, ester oils such as cetyl ethylhexanoate, isotridecyl isononanoate, and distearyl malate, triglycerides such as triethylhexanoin, olive oil, and castor oil, higher alcohols such as octyldodecanol, higher fatty acids such as isostearic acid, and silicone oils such as methylpolysiloxane, highly polymerized methylpolysiloxane, and methylcyclopolysiloxane, etc.

[0019] The melting point of the oily component may be a rising melting point. Incidentally, the melting point of the oily component and the crystallization temperature of the oily component (described later) can be measured using a differential scanning calorimeter (DSC) or the like.

[0020] The content of the high-melting-point oily component (A) in the oil-based solid cosmetic may be 1% by mass or more, or 5% by mass or more, relative to the total amount of the oil-based solid cosmetic. The content of the high-melting-point oily component (A) in the oil-based solid cosmetic may be less than 50% by mass, 40% by mass or less, 30% by mass or less, 20% by mass or less, or 15% by mass or less, relative to the total amount of the oil-based solid cosmetic. The content of the high-melting-point oily component (A) in the oil-based solid cosmetic may be 1% by mass or more but less than 50% by mass, 1% by mass or more but 30% by mass or less, or 1% by mass or more but 20% by mass or less, relative to the total amount of the oil-based solid cosmetic. The content of the high-melting-point oily component (A) in the oil-based solid cosmetic may be 5% by mass or more but less than 50% by mass, 5% by mass or more but 30% by mass or less, or 5% by mass or more but 20% by mass or less, relative to the total amount of the oil-based solid cosmetic. A content of 1% by mass or more of the above-mentioned high-melting-point oily component (A) makes it easier to form the second fluid described later into a slurry. A content of less than 50% by mass of the above-mentioned high-melting-point oily component (A) prevents the viscosity of the second fluid from becoming excessively high. Furthermore, by setting the content of the high-melting-point oily component (A) relative to the total amount of the oily solid cosmetic to the above range, the manufactured oily solid cosmetic can have appropriate hardness and ease of application. Note that the content of the high-melting-point oily component (A) in the oily solid cosmetic relative to the total amount of the oily solid cosmetic corresponds to the content of the high-melting-point oily component (A) relative to the total amount of the second fluid described later.

[0021] The content of the high melting point oily component (A) in the oily solid cosmetic may be 1% by mass or more and 70% by mass or less, may be 1% by mass or more and 50% by mass or less, may be 1% by mass or more and 30% by mass or less, and may be 1% by mass or more and 25% by mass or less, based on the total amount of the oily components contained in the oily solid cosmetic. The content of the high melting point oily component (A) in the oily solid cosmetic may be 5% by mass or more and 70% by mass or less, may be 5% by mass or more and 50% by mass or less, may be 5% by mass or more and 30% by mass or less, and may be 5% by mass or more and 25% by mass or less, based on the total amount of the oily components contained in the oily solid cosmetic. When the content of the high melting point oily component (A) is 1% by mass or more, it is easy to form the second fluid described later into a slurry state. When the content of the high melting point oily component (A) is 70% by mass or less, it is possible to prevent the viscosity of the second fluid from becoming excessively large. Further, the oily solid cosmetic produced by setting the content of the high melting point oily component (A) within the above range with respect to the total amount of the oily components can have appropriate hardness and ease of application. Incidentally, the content of the high melting point oily component (A) in the oily solid cosmetic with respect to the total amount of the oily components corresponds to the content of the high melting point oily component (A) with respect to the total amount of the oily components in the second fluid described later.

[0022] The content (W H ) of the high melting point oily component (A) in the oily solid cosmetic, relative to the content (W L ) of the low melting point oily component (B), the value of the ratio (W L / W H ) may be 4 or more and 40 or less, may be 5 or more and 30 or less, and may be 6 or more and 20 or less. The above ratio is determined, for example, in consideration of the usability, stability, etc. of the oily solid cosmetic. The above ratio may be determined so that a slurry-like fluid described later is generated. Whether a slurry-like fluid is generated or not may depend on the stirring intensity, the melting point of the high melting point oily component (A), the melting point of the low melting point oily component (B), etc.

[0023] The low-melting-point oily component (B) may be miscible or miscible with respect to the high-melting-point oily component (A). However, it is preferable that the high-melting-point oily component (A) and the low-melting-point oily component (B) are miscible when mixed in a liquid state. That is, it is preferable that they be miscible at a temperature above the melting point of the high-melting-point oily component (A).

[0024] The low-melting-point oily component (B) may contain components that are incompatible with the high-melting-point oily component (A), but the amount of such incompatible components is preferably less than 50% by mass, and may be less than 30% by mass, less than 10% by mass, or less than 5% by mass, based on the total amount of the oily solid cosmetic. Furthermore, it is preferable that the oily solid cosmetic does not substantially contain components that are incompatible with the high-melting-point oily component (A). In this specification, "substantially does not contain" the target component means that the content of the target component is preferably 1% by mass or less, more preferably 0.5% by mass or less, and even more preferably 0.1% by mass or less.

[0025] Furthermore, the low-melting-point oily component (B) may contain fluorine-based oils such as fluorine ethers and fluorine-modified silicones such as perfluoroalkyl ether silicones, but the amount of fluorine-based oil is preferably less than 50% by mass of the total amount of the oily solid cosmetic composition, and may be less than 30% by mass, less than 10% by mass, or less than 5% by mass. In addition, it is preferable that the oily solid cosmetic composition does not substantially contain fluorine-based oils.

[0026] The oil-based solid cosmetic composition may contain other components besides the high-melting-point oily component (A) and low-melting-point oily component (B) described above, to the extent that they do not affect the manufacturing process of the oil-based solid cosmetic composition according to this disclosure. Examples of other components include aqueous components, powders, surfactants, UV absorbers, film-forming agents, colorfastness inhibitors, antioxidants, defoaming agents, cosmetic ingredients, preservatives, and fragrances. Such other components may be added together with the high-melting-point oily component (A) and low-melting-point oily component (B) at the beginning of the manufacturing process, or they may be added at an intermediate stage of the manufacturing process.

[0027] The aqueous component content in an oil-based solid cosmetic composition is 30% by mass or less, but may be 20% by mass or less, 10% by mass or less, or 5% by mass or less. Furthermore, it is preferable that the oil-based solid cosmetic composition substantially contains no aqueous component.

[0028] Even if the oil-based solid cosmetic composition contains other components, it is preferable that it mainly contains a high-melting-point oil component (A) and a low-melting-point oil component (B). The ratio of the total content of the high-melting-point oil component (A) and the low-melting-point oil component (B) to the total amount of the oil-based solid cosmetic composition is preferably 60% by mass or more, 80% by mass or more, 90% by mass or more, or 95% by mass or more.

[0029] <Manufacturing process for oil-based solid cosmetics> This disclosure describes a process for processing the raw materials of the oil-based solid cosmetic described above, specifically by changing the state of the raw materials in several stages to obtain the final product, the oil-based solid cosmetic. In the manufacturing process of the oil-based solid cosmetic described in this disclosure, the process starts with oily component raw materials, and the state of these raw materials is changed by heating or cooling to obtain the final product, the oil-based solid cosmetic. Therefore, the types of components and their proportions in the raw materials of the oil-based solid cosmetic, or in the liquid obtained at an intermediate stage of the manufacturing process, are approximately the same as the types of components and their proportions in the oil-based solid cosmetic (final product) described above.

[0030] (Conventional technology) Before specifically describing the embodiments of this disclosure, the prior art for the manufacture of oil-based solid cosmetics will be described. Figure 1 schematically shows an example of a prior art manufacturing process for oil-based solid cosmetics. As shown in Figure 1, first, in the molten material preparation section 10, the raw material SP for the oil-based solid cosmetic is heated in a tank V1 to melt the raw material SP and prepare the molten material, which is the first liquid animal F1. When heating in the molten material preparation section 10, stirring may be performed using a stirring device. The obtained first liquid animal F1 is placed in a temporary storage container Ct' and then left to cool to room temperature. Since the first liquid animal F1 solidifies in the temporary storage container Ct', the temporary storage container Ct' may be damaged when the solidified material Sd is removed. In this case, a disposable container such as a Kabako is used as the temporary storage container Ct'.

[0031] In the manufacture of oil-based solid cosmetics, quality control inspections are usually conducted during the manufacturing process, at least before filling (molding) into the final product containers. Because inspections can be time-consuming, the first liquid material F1 is typically stored in a temporary storage container Ct'. The first liquid material F1 stored in the temporary storage container Ct' is left to stand, and during this time, it cools to room temperature, solidifying into solidified material Sd. Therefore, after inspections are completed, in order to use the solidified material Sd in the subsequent molding process, it is necessary to melt the solidified material Sd again to obtain liquid material. In order to melt the solidified material Sd in a short time, as shown in Figure 1, it is common to cut the solidified material Sd into small-volume pieces Sdi, and then heat each of the solidified material pieces Sdi to obtain small-volume molten material Ldi. Subsequently, in the remelting section 40, the small volume of molten material Ldi is collected in tank V3 and heated while stirring to obtain the molten third liquid animal F3. In the remelting section 40, the contents of tank V3 may also be stirred using a stirring device. Furthermore, in the molding section 50, the third liquid animal F3 is filled into the final product container Cp and cooled to form the oily solid cosmetic Prd.

[0032] Thus, in conventional technology, the first-flow animal F1, which is formed by melting the raw material SP, solidifies during temporary storage. Furthermore, a complicated process is required before the solidified material Sd can be reused. In addition, the transfer of the first-flow animal F1 from tank V1 to temporary storage container Ct' is carried out while the first-flow animal F1 is in a fluid state. For this reason, in conventional technology, the above transfer operation was carried out at a relatively high temperature (for example, between 60°C and 100°C).

[0033] (Embodiments of the present disclosure) Next, embodiments of the manufacturing process for the oil-based solid cosmetic composition according to this disclosure will be described with reference to Figures 2 and 3. Figure 2 shows a flowchart of an example of the manufacturing process for the oil-based solid cosmetic composition according to this disclosure. Figure 3 shows a schematic example of the manufacturing process for the oil-based solid cosmetic composition according to this disclosure, in the same illustrative format as Figure 1.

[0034] As shown in Figure 2, the manufacturing process for an oil-based solid cosmetic according to this disclosure may include a molten material preparation step (S10) of melting and mixing raw materials to obtain a first fluid which is a molten material; a cooling step (S20) of cooling the first fluid under the application of shear force to obtain a second fluid which is a slurry; a storage step (S30) of storing the second fluid at room temperature; a homogenization step (S40) of homogenizing the second fluid; a transfer step (S50) of transferring the homogenized second fluid; a remelting step (S60) of heating the transferred second fluid to obtain a third fluid which is a molten material; and a molding step (S70) of molding the third fluid to obtain an oil-based solid cosmetic. In other embodiments, a step of cooling the second fluid without applying shear force to the second fluid may be further provided between the cooling step S20 and the storage step S30.

[0035] =Molten material preparation step (S10)= In the molten material preparation step (also simply called the "preparation step") (S10), as shown in Figure 3, the raw materials SP for the oily solid cosmetic containing the high-melting-point oily component (A) and the low-melting-point oily component (B) are heated and melted in the molten material preparation section 10 to obtain the first liquid F1. Specifically, the raw materials SP are placed in the tank V1, heated and melted, and then mixed. The heating of the raw materials SP can be performed by adjusting the temperature of the heating jacket hj attached to the tank V1. During heating, for example, the temperature of the contents of the tank V1 can be adjusted to a temperature higher than or equal to the melting point of the high-melting-point oily component (A). Preferably, the above temperature is 5°C or more higher than the melting point of the high-melting-point oily component (A). The above temperature may be 10°C or more higher than the melting point of the high-melting-point oily component (A), or 15°C or more higher than the melting point. The temperature of the first fluid F1 at the end of the molten material preparation step (S10) may be, for example, 60°C or higher and 100°C or lower. In the molten material preparation step (S10), the contents of the tank V1 may be stirred by a stirring device.

[0036] In the first fluid F1 obtained in the molten material preparation step (S10), the high-melting-point oily component (A) and the low-melting-point oily component (B) are mixed in a molten state, i.e., in a liquid state, and exist in a miscible state. Furthermore, the viscosity of the first fluid F1 may be between 10 mPa·s and 5,000 mPa·s at the temperature at the end of the molten material preparation step (S10). In this specification, viscosity refers to the viscosity measured by a B-type viscometer.

[0037] =Cooling step (S20)= Next, in the cooling step (S20), the obtained first fluid F1 is cooled in the cooling unit 20 while applying shear force to obtain the second fluid F2. In the cooling step (S20), as shown in Figure 3, the tank V1 used in the molten material preparation step (S10) can be used as is. That is, an apparatus that serves both as the molten material preparation unit 10 and the cooling unit 20 can be used. Once the cooling step (S20) is started, heating by the heating jacket hj used in the molten material preparation unit 10 may be stopped and natural cooling may be performed. Alternatively, cooling may be actively performed by switching the heating jacket hj to a cooling jacket, etc.

[0038] As shown in Figure 3, instead of using a combined molten material preparation unit 10 and cooling unit 20, the molten material preparation unit 10 and the cooling unit 20 may be performed in separate devices. In other words, instead of performing the molten material preparation step (S10) and the cooling step (S20) in the same tank V1, the first fluid F1 may be moved to a separate tank after the completion of the molten material preparation step (S10) and the cooling step (S20) may be performed there.

[0039] The temperature of the contents in tank V1 at the end of the cooling step (S20) (i.e., the temperature of the second fluid F2) can be set, for example, below the melting point of the high-melting-point oily component (A) and near the crystallization temperature of the high-melting-point oily component (A). The set temperature of the contents in tank V1 at the end of the cooling step (S20) may be ±10°C or ±5°C of the crystallization temperature of the high-melting-point oily component (A), but it is preferable that it is below the crystallization temperature of the melting-point oily component (A). The above temperature may be 5 degrees or more lower than the crystallization temperature of the high-melting-point oily component (A), and may be 10 degrees or more lower than the crystallization temperature of the high-melting-point oily component (A). By applying a relatively high shear force to the first fluid F1 in the above temperature range, the overall solidification of the first fluid F1 is inhibited, and a slurry-like second fluid F2 can be produced.

[0040] Furthermore, if the crystallization temperature of the high-melting-point oily component (A) is above room temperature, the temperature of the second fluid F2 at the end of the cooling step (S20) may be set to room temperature. Also, in this embodiment, the temperature of the second fluid F2 at the end of the cooling step (S20) is set to be above the melting point of the low-melting-point oily component (B). This results in a slurry-like second fluid F2 in which particles of the high-melting-point oily component (A) are dispersed in the liquid low-melting-point oily component (B). More specifically, the temperature of the second fluid F2 at the end of the cooling step (S20) may be 0°C or higher and 40°C or lower, 10°C or higher and 40°C or lower, or 15°C or higher and 35°C or lower.

[0041] According to this embodiment, the temperature of the second fluid F2 obtained in the cooling step (S20) is near room temperature or lower than room temperature. This improves the safety of the process of transferring it to the temporary storage container Ct for storage in subsequent steps.

[0042] In the cooling step (S20) according to this embodiment, the mechanism by which the first fluid F1 does not solidify entirely, but instead a slurry-like second fluid F2 is produced, is not entirely clear, but it can be inferred as follows. As cooling progresses in the cooling step (S20), crystallization of the high-melting-point oily component (A) in the first fluid F1 begins. At this time, since a relatively high-strength shear force is continuously applied to the first fluid F1, a solid phase of the high-melting-point oily component (A) is formed on top of the microcrystals of the high-melting-point oily component (A). In addition, the growth of crystals of the high-melting-point oily component (A) (for example, plate-like crystals) is suppressed. As a result, a slurry-like second fluid F2 is obtained in which particles of the high-melting-point oily component (A) are dispersed in a liquid low-melting-point oily component (B).

[0043] Conventionally, when the first fluid animal F1 is cooled without applying a shear force, or when the shear force applied to the first fluid animal F1 is small, the high-melting-point oily component (A) crystallizes and becomes a solid as the temperature decreases, incorporating the low-melting-point oily component (B) (solidified product Sd formed by cooling in container Ct' in Figure 1). In this case, for example, a gel-like solidified product Sd is obtained that has a structure in which the low-melting-point oily component (B) is held within the three-dimensional structure of plate-like crystals of the high-melting-point oily component (A) (sometimes called a cardhouse structure). However, as described above, by cooling the first fluid animal F1 while applying a shear force to it, the incorporation of the low-melting-point oily component (B) is suppressed, and a slurry-like second fluid animal F2 containing particles of the high-melting-point oily component (A) is obtained.

[0044] In other words, the shear force applied to the first fluid F1 in the cooling step (S20) is such that it promotes heterogeneous nucleation of the high-melting-point oily component (A) in the first fluid F1, or inhibits the crystal growth of the high-melting-point oily component (A) precipitated on the first fluid F1. For example, in the manufacture of oily solid cosmetics, the fluid may be stirred to homogenize the temperature or the distribution of components. However, in this embodiment, the stirring device and / or stirring conditions are designed and / or adjusted so that a stronger shear force is applied to the fluid compared to the case where the purpose is to homogenize the temperature or the distribution of components of the fluid.

[0045] Generally, the energy imparted to a fluid by stirring is consumed by (i) a discharge action that circulates the fluid and (ii) a shear action that atomizes or disperses bubbles, droplets, etc. When the purpose of stirring is to homogenize the temperature or component distribution within the system, the stirring device and / or stirring conditions can be designed and / or adjusted so that most of the energy imparted by stirring is consumed by the discharge action and the energy consumed by the shear action is suppressed. On the other hand, when the purpose of stirring is to impart a strong shear force to the system, the stirring device and / or stirring conditions can be designed and / or adjusted so that most of the energy imparted by stirring is consumed by the shear action and the energy consumed by the discharge action is suppressed.

[0046] In designing and / or adjusting the stirring apparatus and / or stirring conditions, for example, (i) the rotational speed of the impeller, (ii) the shape, size, and mounting position of the impeller, and (iii) the size relationship between the impeller and the stirring tank are determined. Each of these matters is determined, for example, based on the results of small-scale experiments using actual or simulated liquids and / or simulation experiments. For example, the design and operating conditions of the actual machine are determined by appropriately scaling up based on these experimental results. A person skilled in the art who has read this specification can determine the stirring apparatus and / or stirring conditions that can produce a slurry-like second fluid F2 without requiring excessive experimentation or trial and error.

[0047] The shear force applied in the cooling step (S20) is preferably a relatively large shear force. For example, a shear force sufficient for use in emulsification or dispersion applications is applied. In one embodiment, the shear force applied to the system in the cooling step (S20) is greater than the shear force applied to the system in the molten material preparation step (S10). In another embodiment, the shear force applied to the system in the cooling step (S20) is greater than any shear force that may be applied to the system in any step other than the cooling step (S20) in this disclosure.

[0048] The shear force applied to the first fluid F1 in the cooling step (S20) can be achieved, for example, by stirring using a stirring device. When using a device that serves both as a molten material preparation unit 10 and a cooling unit 20, as shown in Figure 3, if a stirring device is used in the molten material preparation step (S10), the same stirring device used in the molten material preparation step (S10) may be used in the cooling step (S20). In this case, stirring should be performed under conditions that apply a greater shear force than that applied by stirring in the molten material preparation step (S10), for example, at a higher stirring speed. For stirring in the cooling step (S20), it is preferable to use a stirring device that can handle stirring of high-viscosity fluids, such as a stirring device equipped with stirring blades like anchor blades or ribbon blades.

[0049] Other methods for applying shear force besides agitation include tank oscillation (including rotation), ultrasonic stimulation, and the use of a static mixer or line mixer. Furthermore, instead of the tank and impeller combination shown in Figure 3, vibratory mixing devices such as vibromixers (devices equipped with spiral impellers that utilize the up-and-down motion of the impellers), static mixers, or line mixers can be used as agitation devices.

[0050] In the cooling step (S20), when a shear force is applied to the first fluid F1 by the agitator, the agitation conditions may remain substantially the same from the start to the end of the cooling step (S20), or the agitation conditions may be changed in the middle of the cooling step (S20). For example, the agitation speed (e.g., the rotation speed of the agitator blade) may be changed in stages or gradually during the cooling step (S20). Therefore, the cooling step (S20) can consist of multiple steps, including a first cooling step (S21) and a second cooling step (S22) that apply different shear forces. For example, the cooling step (S20) may include a first cooling step (S21) in which a first shear force is applied to the first fluid F1 while cooling, and a second cooling step (S22) in which a second shear force is applied to the first fluid F1 while cooling, in that order. Furthermore, the magnitude of the first shear force may differ from the magnitude of the second shear force. For example, the stirring speed in the first cooling step (S21) and the stirring speed in the second cooling step (S22) may be different.

[0051] If the cooling step (S20) includes two cooling steps as described above, the first cooling step (S21) may be primarily aimed at lowering the temperature and homogenizing the fluid F1, and the second cooling step (S22) may be primarily aimed at turning the fluid F1 into a slurry. In that case, the magnitude of the first shear force in the second cooling step (S22) may be greater than the magnitude of the second shear force in the first cooling step (S21). For example, in the first cooling step (S21), the first fluid F1, which became hot in the molten material preparation step (S10), is cooled to a temperature slightly higher than the crystallization temperature while applying a first shear force, and then homogenized. Subsequently, in the second cooling step (S22), the fluid is further cooled within a temperature range near the crystallization temperature while applying a second shear force that is greater than the first shear force applied in the first cooling step (S21), thereby promoting the precipitation of fine crystals and turning the fluid into a slurry. To give a more specific example, if the crystallization temperature of the high-melting-point oily component (A) is T°C, in the first cooling step (S21), the mixture is cooled to T+10°C, preferably T+5°C, while applying a first shear force. Then, in the second cooling step (S22), the mixture is cooled to a temperature of T±10°C, preferably T±5°C, while applying a second shear force greater than the first shear force, which is sufficient to slurry the fluid. In this way, by including multiple steps in the cooling step (S20), a more uniform slurry-like second fluid can be obtained. Note that once the slurring of the granular material is complete, that is, once the crystallization of the high-melting-point oily component (A) is complete, the shear force may be changed back to a small shear force.

[0052] In other embodiments, the cooling step (S20) includes a first cooling step (S21) in which stirring energy is applied to the first fluid F1 using a first stirring device while it is cooled, and a second cooling step (S22) in which stirring energy is applied to the first fluid F1 using a second stirring device while it is cooled, and the first stirring device and the second stirring device may be different. In this case, the stirring method of the first stirring device and the stirring method of the second stirring device may be different. In one embodiment, one of the first stirring device and the second stirring device may be a general stirring device that utilizes stirring by the rotation of a stirring blade, and the other may be a vibrating stirring and mixing device. In other embodiments, the first stirring device may be a stirring device in which the shearing action is greater than the discharge action, and the second stirring device may be a stirring device in which the discharge action is greater than the shearing action. The first stirring device may be a high-shear mixer for emulsification or dispersion applications. The first stirring device is used at least during the period when the temperature of the first fluid F1 is within ±10°C of the crystallization temperature of the high-melting-point oily component (A) (preferably within ±5°C of the crystallization temperature).

[0053] As described above, the second fluid F2 obtained by the cooling step (S20) is a slurry in which particles (microcrystals) of the high-melting-point oily component (A) are dispersed in the low-melting-point oily component (B). This slurry can undergo phase separation by being left at room temperature for a predetermined time or longer. The predetermined time may be 12 hours or more and 48 hours or less. The phases formed by phase separation are a phase consisting of the low-melting-point oily component (B) and a phase mainly consisting of the high-melting-point oily component (A) and containing the low-melting-point oily component (B). The phase containing the high-melting-point oily phase component (A) may contain powders or the like. Furthermore, the temperature of the second fluid F2 at the end of the cooling step (S20) may be 100 mPa·s or more and 50,000 mPa·s or less, preferably 100 mPa·s or more and 10,000 mPa·s or less. Furthermore, the viscosity of the second fluid F2 when measured at room temperature (25°C) may be between 100 mPa·s and 50,000 mPa·s, preferably between 100 mPa·s and 10,000 mPa·s.

[0054] The cooling step (S20) is a step to suppress the crystal growth of the high-melting-point oily component (A). In this step, particles of the high-melting-point oily component (A) may be added from the outside. Alternatively, particles made of a material not included in the raw materials of the oily solid cosmetic may be added as crystal nuclei. The addition of crystal nuclei can induce heterogeneous nucleation. This can suppress the growth of plate-like crystals of the high-melting-point oily component (A). As a result, the formation of the card house structure described above is suppressed, and the formation of slurry-like second fluid animal F2 is promoted. In this case, slurry-like second fluid animal F2 may be produced in which particles added from the outside are dispersed in the liquid phase of the high-melting-point oily component (A) and the low-melting-point oily component (B).

[0055] The temperature of the contents in tank V1 at the end of the cooling step (S20) may be lower than the crystallization temperature of the high-melting-point oily component (A), for example, 10°C lower than the crystallization temperature. The specific temperature of the contents in tank V1 at the end of the cooling step (S20) may be between 0°C and 40°C.

[0056] (An example of another embodiment) In this embodiment, the details of the manufacturing process for an oily solid cosmetic were illustrated using the case where the cooling step (S20) is carried out using a single tank reactor as an example. However, the manufacturing process for an oily solid cosmetic is not limited to this embodiment. According to other embodiments, the cooling step (S20) is carried out using multiple reactors. The above multiple reactors may include a first tank reactor and a second tank reactor. The above multiple reactors may include a first tubular reactor and a second tubular reactor. The above multiple reactors may include a tank reactor and a tubular reactor. The above multiple reactors may include, for example, a reactor for cooling the first fluid F1 to near the crystallization temperature of the high-melting-point oily component (A) while keeping the temperature distribution of the first fluid F1 as uniform as possible, and a reactor for applying a high-intensity shear force to the first fluid F1 at least near the crystallization temperature of the high-melting-point oily component (A) to produce a slurry-like second fluid F2.

[0057] =Storage Step (S30)= The slurry-like second fluid F2 obtained in the cooling step (S20) is transferred to a temporary storage container Ct in the storage section 30 in the storage step (S30) and stored. Since the second fluid F2 is fluid at the end of the cooling step (S20), it is easy to transfer it from the tank V1 of the molten material preparation section 10 and the cooling section 20 to the temporary storage container Ct, and can be done, for example, by using a pump through a conduit. Similarly, it is easy to transfer it from the temporary storage container Ct to another container or device for subsequent steps. In this specification, the term "fluidity," when used without any specific conditions, refers to a state in which it can flow when normal external forces are applied in the manufacturing process of oily solid cosmetics, and refers to a state in which pump transport, which can be carried out in the manufacturing process of oily solid cosmetics, is possible.

[0058] Thus, the fluidity of the second-flow animal F2 facilitates its placement in a temporary storage container Ct and its transfer from the temporary storage container Ct to another device. Furthermore, unlike the conventional temporary storage container Ct' which had to be destroyed each time, the temporary storage container Ct according to this disclosure is reusable. The temporary storage container Ct may be, for example, a stainless steel drum. According to this disclosure, the costs associated with temporary storage containers and their disposal can be reduced, as can the environmental burden of disposal.

[0059] In the storage step (S30), the storage time of the second fluid F2 in the temporary storage container Ct may be 6 hours or more, 10 hours or more, 12 hours or more, 18 hours or more, 20 hours or more, or 24 hours or more. The above upper limit of storage time is not particularly limited, but the storage period may be 6 hours or more and 72 hours or less, 10 hours or more and 50 hours or less, 12 hours or more and 36 hours or less, or 12 hours or more and 24 hours or less.

[0060] While the second liquid animal F2 is temporarily stored in the storage step (S30), a portion of the second liquid animal F2 can be sampled and inspected for quality control purposes at a stage prior to the final step of the manufacturing process, i.e., prior to the molding step (S70). Furthermore, if the composition containing the high-melting-point oily component (A) and the low-melting-point oily component (B) can be temporarily stored in the second liquid animal F2 state during the storage step (S30), the second liquid animal F2 can be immediately supplied to the subsequent remelting step (S60) at the time of the request for the manufacture of the final product, regardless of whether inspection is necessary.

[0061] Thus, Secondary Animal F2 is an intermediate that can be temporarily stored at any time and used according to manufacturing requirements. In other words, Secondary Animal F2 is used as a precursor composition for the production of oily solid cosmetics in the manufacturing process of oily solid cosmetics.

[0062] =Homogenization step (S40)= The second fluid F2 stored in the storage step (S30) is subjected to the homogenization step (S40) for the manufacture of the final product, if there is a demand for its manufacture. If the second fluid F2 is stored for a predetermined time or longer during the storage step (S30), phase separation may occur as described above. Therefore, it is preferable to homogenize the second fluid F2 in the homogenization step (S40) by stirring or the like. The homogenization step (S40) can also be carried out by transferring the second fluid F2 in the temporary storage container Ct to another device, but this is not always necessary. The homogenization step (S40) can be carried out, for example, by inserting and operating a stirring device, such as a stirring blade, into the temporary storage container Ct. The second fluid F2 retains its fluidity during the storage step (S30) and also retains its fluidity after the homogenization step (S40).

[0063] Furthermore, if primary storage of the second fluid F2 is not required, the second fluid F2 may be subjected to the transfer step (S50) and remelting step (S60) without going through the storage step (S30) and the homogenization step (S40). Also, if, for example, the storage time in the storage step (S30) is short and the second fluid F2 has not undergone phase separation, the homogenization step (S40) may be omitted.

[0064] =Transfer step (S50)= In the transfer step (S50), the second fluid F2 is transferred to the remelting section 40. As described above, the second fluid F2 remains fluid even after the storage step (S30) and remains fluid even after the homogenization step (S40). Therefore, the second fluid F2 can be easily transferred through a conduit using a fluid transfer means normally used in the manufacturing process of oily solid cosmetics, such as a pump. Thus, according to this disclosure, the complicated work required for remelting (such as fragmenting the solidified material) as in the conventional method is unnecessary. Moreover, in this disclosure, the second fluid F2 is already at a low temperature that poses little risk of burns to human contact by the time the cooling step (S20) is completed, so the safety of the transfer step (S50) is also high.

[0065] =Remelting step (S60)= Next, in the remelting step (S60), the second fluid F2 is heated again in the remelting section 40 to obtain a third fluid F3, which is a molten material or molten mixture. The remelting section 40 may be an apparatus equipped with a tank V3 and a stirring device. In the remelting step (S60), the contents of the tank V3 are heated until the temperature reaches a temperature equal to or greater than the melting point of the high-melting-point oily component (A), similar to the molten material preparation step (S10). The above temperature may be, for example, 5°C or more, 10°C or more, or 15°C or more higher than the melting point of the high-melting-point oily component (A). The temperature of the third fluid F3 obtained at the end of the remelting step (S60) may be, for example, 50°C or more and 100°C or less.

[0066] =Molding step (S70)= The third-stream animal F3 obtained in the remelting step (S60) can be molded in the molding step (S70) to obtain the final product, an oily solid cosmetic. The molding unit 50 used in the molding step (S70) is the same as the molding unit 50 used in the prior art (Figure 1). In the molding unit 50, the third-stream animal F3 can be filled into a container Cp for the final product and cooled to form the oily solid cosmetic Prd.

[0067] <Method of manufacturing fluids> Thus, in the manufacturing process for oily solid cosmetics according to this disclosure, a second fluid F2 can be produced. This second fluid F2 is a precursor composition for manufacturing oily solid cosmetics that is fluid even at room temperature and is suitable for temporary storage. Therefore, according to this disclosure, the complexity of the work involved in the manufacturing of oily solid cosmetics can be prevented, and safety in manufacturing and manufacturing costs can be improved. Accordingly, an embodiment of this disclosure may be a method for producing a fluid that includes at least a preparation step (S10) of preparing a first fluid F1 containing a molten mixture or molten material of oily components, and a cooling step (S20) of cooling the first fluid F1 while applying a shear force to obtain a slurry-like second fluid F2 containing a part of the molten mixture or molten material as particles.

[0068] One embodiment may be a method for producing a fluid, comprising: a preparation step (S10) of preparing a first fluid containing a molten mixture of an oily component (A) having a melting point greater than 25°C and an oily component (B) having a lower melting point than the oily component (A); and a cooling step (S20) of cooling the first fluid while applying a shearing force to the first fluid to obtain a slurry-like second fluid containing particles of the oily component (A).

[0069] Another embodiment may be a method for producing a fluid, comprising: a preparation step (S10) of preparing a first fluid containing a molten oily component; a cooling step (S20) of cooling the first fluid while applying a shearing force to obtain a slurry-like second fluid containing a portion of the oily component as particles; and a heating step of heating the second fluid to obtain a third fluid containing the molten oily component.

[0070] <Precursor composition for manufacturing oil-based solid cosmetics> Furthermore, one embodiment may be a precursor composition for manufacturing oily solid cosmetics, which is a slurry containing particles of an oily component (A) having a melting point greater than 25°C and a molten oily component (B) having a lower melting point than the oily component (A). This precursor composition is the second fluid animal F2 described above.

[0071] The precursor composition for manufacturing oil-based solid cosmetics according to this embodiment may contain the same types of components and their proportions as the raw materials for the oil-based solid cosmetics described above.

[0072] Although the present disclosure has been described above based on specific embodiments and examples, these embodiments and examples are merely presented as examples, and the present disclosure is not limited to the above embodiments and examples. Various changes, modifications, substitutions, deletions, additions, and combinations are possible within the scope of the present disclosure.

[0073] The present specification includes, for example, the following:

[0074] [Item 1] A preparation step involves preparing a first fluid containing a molten mixture of an oily component (A) having a melting point above 25°C and an oily component (B) having a lower melting point than the oily component (A). A cooling step is performed in which a shear force is applied to the first fluid while the first fluid is cooled to obtain a slurry-like second fluid containing particles of the oily component (A). A method for producing fluids, including

[0075] [Item 2] Preparation step: Prepare a first fluid containing a molten oily component, A cooling step involves applying a shearing force to the first fluid while cooling it to obtain a slurry-like second fluid containing a portion of the oily component as particles, A heating step involves heating the second fluid to obtain a third fluid containing a molten oily component, A method for producing fluids, including

[0076] [Item 3] The method for producing a fluid as described in item 2, wherein the oily component contains a molten mixture of an oily component (A) having a melting point above 25°C and an oily component (B) having a lower melting point than the oily component (A).

[0077] [Item 4] The method for producing a fluid according to item 2 or 3, wherein the second fluid contains particles of the oily component (A).

[0078] [Item 5] A method for producing a fluid according to any one of items 1 to 4, wherein the viscosity of the second fluid is 50,000 mPa·s or less.

[0079] [Item 6] A method for producing a fluid according to any one of items 1 to 5, wherein the water content relative to the total amount of the second fluid is less than 30% by mass.

[0080] [Item 7] The method for producing a fluid according to any one of items 1 to 6, wherein the oily component (A) is one or more selected from the group consisting of hydrocarbons, esters, higher alcohols, higher fatty acids, and silicones.

[0081] [Item 8] A method for producing a fluid according to any one of items 1 to 7, wherein the content of the oily component (A) relative to the total amount of the second fluid is 1% by mass or more and 20% by mass or less.

[0082] [Item 9] A method for producing a fluid according to any one of items 1 to 8, wherein the temperature of the second fluid is below the melting point of the oily component (A) and above the melting point of the oily component (B).

[0083] [Item 10] A method for producing a fluid according to any one of items 1 to 9, wherein the temperature of the second fluid is 10°C or higher and 40°C or lower.

[0084] [Item 11] A method for producing a fluid according to any one of items 1 to 10, wherein the cooling step further comprises cooling to a temperature below the melting point of the oily component (A) and above the melting point of the oily component (B), and then applying a shear force to the second fluid while maintaining that temperature.

[0085] [Item 12] The cooling step is, A first cooling step in which a first shear force is applied to the first fluid while the first fluid is cooled, The method includes a second cooling step in which a second shear force is applied to the first fluid that has been cooled in the first cooling step while the first fluid is being cooled, A method for producing a fluid according to any one of items 1 to 11, wherein the magnitude of the first shear force and the magnitude of the second shear force are different.

[0086] [Item 13] The first cooling step includes applying the first shear force to the first fluid using a first stirring device, The second cooling step includes applying the second shear force to the first fluid using a second stirring device. A method for producing a fluid according to any one of items 1 to 11, wherein the first stirring device and the second stirring device are different.

[0087] [Item 14] The method for producing a fluid according to any one of items 1 to 13, wherein the second fluid is a precursor composition for the manufacture of an oily solid cosmetic.

[0088] [Item 15] A method for producing an oily solid cosmetic, comprising a molding step of changing the state of the precursor composition produced by the liquid production method described in item 14 and molding it to obtain an oily solid cosmetic.

[0089] [Item 16] A precursor composition for manufacturing oily solid cosmetics, comprising a slurry containing particles of an oily component (A) having a melting point greater than 25°C, and a molten substance of an oily component (B) having a lower melting point than the oily component (A).

[0090] [Item 17] A precursor composition for the manufacture of oily solid cosmetic products as described in item 16, wherein the viscosity at 25°C is 50,000 mPa·s or less.

[0091] [Item 18] A precursor composition for manufacturing oily solid cosmetics according to item 16 or 17, wherein the water content relative to the total amount of the precursor composition is less than 30% by mass.

[0092] [Item 19] The precursor composition for manufacturing oily solid cosmetic according to any one of items 16 to 18, wherein the oily component (A) is one or more selected from the group consisting of hydrocarbons, esters, higher alcohols, higher fatty acids, and silicones.

[0093] [Item 20] A precursor composition for manufacturing an oily solid cosmetic, according to any one of items 16 to 19, wherein the content of the oily component (A) relative to the total amount of the precursor composition is 1% by mass or more and 20% by mass or less. [Explanation of Symbols]

[0094] 10. Molten material preparation section 20 Cooling section 30 Storage Department 40 Remelted section 50 Molding section Ct, Ct' Temporary storage container Cp final product container F1 1st fluid animal F2 2nd fluid animal F3 3rd fluid animal HJ Heated Jacket Sd solidified Prd Oil-based solid cosmetic V1, V3 tank

Claims

1. A preparation step involves preparing a first fluid containing a molten mixture of an oily component (A) having a melting point above 25°C and an oily component (B) having a lower melting point than the oily component (A). A cooling step is performed in which a shear force is applied to the first fluid while the first fluid is cooled to obtain a slurry-like second fluid containing particles of the oily component (A). A method for producing fluids, including

2. Preparation step: Prepare a first fluid containing a molten oily component. A cooling step involves applying a shear force to the first fluid while cooling it to obtain a slurry-like second fluid containing a portion of the oily component as particles, A heating step involves heating the second fluid to obtain a third fluid containing a molten oily component, A method for producing fluids, including

3. The method for producing a fluid according to claim 2, wherein the oily component contains a molten mixture of an oily component (A) having a melting point above 25°C and an oily component (B) having a lower melting point than the oily component (A).

4. The method for producing a fluid according to claim 3, wherein the second fluid contains particles of the oily component (A).

5. The method for producing a fluid according to claim 1 or 2, wherein the viscosity of the second fluid is 50,000 mPa·s or less.

6. The method for producing a fluid according to claim 1 or 2, wherein the water content relative to the total amount of the second fluid is less than 30% by mass.

7. The method for producing a fluid according to claim 1 or 2, wherein the oily component (A) is one or more selected from the group consisting of hydrocarbons, esters, higher alcohols, higher fatty acids, and silicones.

8. The method for producing a fluid according to claim 1 or 2, wherein the content of the oily component (A) relative to the total amount of the second fluid is 1% by mass or more and 20% by mass or less.

9. The method for producing a fluid according to claim 1 or 2, wherein the temperature of the second fluid is below the melting point of the oily component (A) and above the melting point of the oily component (B).

10. The method for producing a fluid according to claim 9, wherein the temperature of the second fluid is 10°C or higher and 40°C or lower.

11. The method for producing a fluid according to claim 9, wherein the cooling step further comprises cooling to a temperature below the melting point of the oily component (A) and above the melting point of the oily component (B), and then applying a shear force to the second fluid while maintaining that temperature.

12. The cooling step is, A first cooling step in which a first shear force is applied to the first fluid while the first fluid is cooled, The method includes a second cooling step in which a second shear force is applied to the first fluid that has been cooled in the first cooling step while the first fluid is being cooled, A method for producing a fluid according to claim 1 or 2, wherein the magnitude of the first shear force and the magnitude of the second shear force are different.

13. The first cooling step includes applying a first shear force to the first fluid using a first stirring device, The second cooling step includes applying the second shear force to the first fluid using a second stirring device, The method for producing a fluid according to claim 12, wherein the first stirring device and the second stirring device are different.

14. The method for producing a fluid according to claim 1 or 2, wherein the second fluid is a precursor composition for producing an oily solid cosmetic.

15. A method for producing an oily solid cosmetic, comprising a molding step of changing the state of the precursor composition produced by the liquid production method described in claim 14 and molding it to obtain an oily solid cosmetic.

16. A precursor composition for manufacturing oily solid cosmetics, comprising a slurry containing particles of an oily component (A) having a melting point above 25°C and a molten substance of an oily component (B) having a lower melting point than the oily component (A).

17. The precursor composition for manufacturing oily solid cosmetic composition according to claim 16, wherein the viscosity at 25°C is 50,000 mPa·s or less.

18. The precursor composition for manufacturing oily solid cosmetics according to claim 16 or 17, wherein the water content relative to the total amount of the precursor composition is less than 30% by mass.

19. The precursor composition for producing an oily solid cosmetic according to claim 16 or 17, wherein the oily component (A) is one or more selected from the group consisting of hydrocarbons, esters, higher alcohols, higher fatty acids, and silicones.

20. The precursor composition for manufacturing an oily solid cosmetic according to claim 16 or 17, wherein the content of the oily component (A) relative to the total amount of the precursor composition is 1% by mass or more and 20% by mass or less.

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